Okay, here is my crossover rec (cut and pasted from my rec post):

For Every Closed Door by starlingthefool
Summary: Crossover with "Dead like Me" (note: I never even heard of "Dead Like Me" before reading this and it didn't matter)
Why you should read it: While it is a kind of death fic, they are ghosts so it is not very sad. It's long and hopeful and funny and interesting and makes the idea of ghosts seem totally realistic. Kept me up reading into the wee hours. Epic length.


It was really, really excellent. :)